Impact of Lifestyle Intervention on Long-Term Beverage Intake in Children with Overweight and Obesity: A 3-Year Follow-Up Study

Background: Higher intake of sugar-sweetened beverages (SSBs) increases the risk of childhood obesity, while the effects of non-caloric beverages (NCBs) and dairy beverages remain inconsistent. This study investigated changes in beverage intake following a 10-week lifestyle camp and explored associations between changes in beverage intake and anthropometric measures. Methods: Children from two camp sites and aged 7–14 years (n:190) with overweight/obesity were included and pooled for the present study. Beverage intake was assessed by a Food Frequency Questionnaire at baseline, at 10 weeks, and at a one- and three-year follow-up. Anthropometry was assessed at the same timepoints. Results: Compared to baseline, participants had lower odds of reporting a high intake of SSBs (OR: 0.14, 95%-CI: 0.07; 0.28), NCBs (OR: 0.19, 95%-CI: 0.11; 0.34) and chocolate milk (OR: 0.18, 95%-CI: 0.09; 0.36) at 10 weeks, relative to a low intake, and were more likely to report a high intake of water. One and three years after the camp, the changes attenuated, reaching baseline levels for water, SSBs, and NCBs at the three-year follow-up. Across time, only weak to moderate correlations were observed between changes in beverage intake and BMI-SDS, body fat (%), and skeletal muscle mass (Spearman’s rho = +/− 0.19–0.31). Conclusions: The lifestyle camp intervention effectively improved beverage intake among children with overweight/obesity; however, the changes were not sustained, emphasizing the need for long-term support to maintain the health benefits. Without a control group, it is not possible to determine whether these changes reflect natural variations in beverage intake.